21071228

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{347}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 42094080

約数和(自身を除く): 21022852

約数列:

[1, 2, 4, 17, 19, 34, 38, 47, 68, 76, 94, 188, 323, 347, 646, 694, 799, 893, 1292, 1388, 1598, 1786, 3196, 3572, 5899, 6593, 11798, 13186, 15181, 16309, 23596, 26372, 30362, 32618, 60724, 65236, 112081, 224162, 277253, 309871, 448324, 554506, 619742, 1109012, 1239484, 5267807, 10535614, 21071228]

約数ペア:

[(1, 21071228), (2, 10535614), (4, 5267807), (17, 1239484), (19, 1109012), (34, 619742), (38, 554506), (47, 448324), (68, 309871), (76, 277253), (94, 224162), (188, 112081), (323, 65236), (347, 60724), (646, 32618), (694, 30362), (799, 26372), (893, 23596), (1292, 16309), (1388, 15181), (1598, 13186), (1786, 11798), (3196, 6593), (3572, 5899)]